In need for advices about Depersonalization OCD

Hello everyone,

I am doing pretty fine these days about my OCD, i managed to defeat Pure-O almost completely, but i just needed some advices.

I sometime experience depersonalization caused by OCD, making me feel as if i wasn't really me, and as if i was someone else (so having another face/body).. which is actually very annoying and i don't want to have this when around my girlfriend.
So OCD tends to suggest i am not really myself and makes me think of someone, and makes me feel as if i was in that person's body, and i experience some strange feelings as if i was disconnected from my own body..

Does anyone have good advices about what could i do to defeat it like i defeated the other obsessions ?